Differentiation hypotheses concern changes in the structural organization of cognitive abilities that depend on the level of general intelligence (ability differentiation) or age (developmental differentiation). Part 1 of this article presents a review of the literature on ability and developmental differentiation effects in children, revealing…

This study investigates how individual differences in 7- to 9-year-olds' curiosity relate to the inquiry-learning process and outcomes in environments differing in structure. The focus on curiosity as individual differences variable was motivated by the importance of curiosity in science education, and uncertainty being central to both the…

Presents study results of Verbal and Performance Weschler Intelligence Scale for Children-Revised subscales collected from Native (n=691) and non-Native (n=234) children in grades 2 and 4 at four sites. Native children had substantially lower IQ scores, especially pronounced for the verbal subscales. Discusses implications for understanding IQ…

This study investigated the feasibility of using the ordering theoretic procedure with multiple choice items, and its usefulness as an interpretive aid for intelligence test data. Data from two components of a group-administered multiple choice intelligence test (Otis-Lennon Mental Ability Tests) were analyzed using ordering theory procedure for…

An investigation is being made of the effects of the interaction between differing socioeconomic backgrounds and two beginning reading programs on the reading achievement of pupils at three ability levels. This report gives the results of data that have been collected for grades 1 and 2 only. Participating were 754 pupils in a small city school…